Which us president proposed a decimal based measurement system for the us

The correct answer is Thomas Jefferson.

In 1790, as Secretary of State, Thomas Jefferson proposed a Uniform System of Coinage, Weights, and Measurements that included a decimal based measurement system.

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.

answer; when one group has an extremely high score at pretest;